fog begins and that takes us into the weekend. big time cooling next week. pam and dave. >>> thank you. the mystery of what has been lurking at the airport has been solved. what airport officials uncovered when they looked underneath terminal a. >>> and governor arnold schwarzenegger is thanking steve jobs. what he has to do with the next trip to the dmv. >>> good morning. right now, your next trip to marin county is looking good. more on the commute coming up. >>> welcome back. 5:10. this morning, an investigation is under way into the cause of the latest oil rig fire in the gulf of mexico. the mariner energy platform is west of the bp oil rig. all 13 workers jumped into the water and were rescued. ktv's allison burns has the latest. >> reporter: good morning. yesterday's oil rig fire was different than the bp disaster five months ago. it still raises a lot of questions about how oil rigs operate and the safety of their operation in the gulf. already some environment groups and members of congress say this is proof that off-shore drilling is too dangerous.